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snmp_ntp.c
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/*
* Copyright (c) 2005
* Hartmut Brandt.
* All rights reserved.
*
* Author: Harti Brandt <[email protected]>
*
* Redistribution of this software and documentation and use in source and
* binary forms, with or without modification, are permitted provided that
* the following conditions are met:
*
* 1. Redistributions of source code or documentation must retain the above
* copyright notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE AND DOCUMENTATION IS PROVIDED BY FRAUNHOFER FOKUS
* AND ITS CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* FRAUNHOFER FOKUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Begemot: bsnmp/snmp_ntp/snmp_ntp.c,v 1.9 2005/10/06 07:15:01 brandt_h Exp $
*
* NTP interface for SNMPd.
*/
#include <sys/queue.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <ctype.h>
#include <errno.h>
#include <netdb.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#elif defined(HAVE_INTTYPES_H)
#include <inttypes.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include "support.h"
#include "snmpmod.h"
#include "ntp_tree.h"
#include "ntp_oid.h"
#define NTPC_MAX 576
#define NTPC_VERSION 3
#define NTPC_MODE 6
#define NTPC_DMAX 468
#define NTPC_BIT_RESP 0x80
#define NTPC_BIT_ERROR 0x40
#define NTPC_BIT_MORE 0x20
#define NTPC_OPMASK 0x1f
#define NTPC_OP_READSTAT 1
#define NTPC_OP_READVAR 2
/* our module handle */
static struct lmodule *module;
/* debug flag */
static uint32_t ntp_debug;
#define DBG_DUMP_PKTS 0x01
#define DBG_DUMP_VARS 0x02
/* OIDs */
static const struct asn_oid oid_ntpMIB = OIDX_ntpMIB;
/* the Object Resource registration index */
static u_int reg_index;
/* last time we've fetch the system variables */
static uint64_t sysinfo_tick;
/* cached system variables */
static int32_t sys_leap;
static int sysb_leap;
static int32_t sys_stratum;
static int sysb_stratum;
static int32_t sys_precision;
static int sysb_precision;
static char *sys_rootdelay;
static char *sys_rootdispersion;
static char *sys_refid;
static char sys_reftime[8];
static int sysb_reftime;
static int32_t sys_poll;
static int sysb_poll;
static uint32_t sys_peer;
static int sysb_peer;
static u_char sys_clock[8];
static int sysb_clock;
static char *sys_system;
static char *sys_processor;
static int sysb_jitter;
static double sys_jitter;
static int sysb_stability;
static double sys_stability;
/* last time we've fetch the peer list */
static uint64_t peers_tick;
/* request sequence number generator */
static uint16_t seqno;
/* NTPD socket */
static int ntpd_sock;
static void *ntpd_fd;
struct peer {
/* required entries for macros */
uint32_t index;
TAILQ_ENTRY(peer) link;
int32_t config; /* config bit */
u_char srcadr[4]; /* PeerAddress */
uint32_t srcport; /* PeerPort */
u_char dstadr[4]; /* HostAddress */
uint32_t dstport; /* HostPort */
int32_t leap; /* Leap */
int32_t hmode; /* Mode */
int32_t stratum; /* Stratum */
int32_t ppoll; /* PeerPoll */
int32_t hpoll; /* HostPoll */
int32_t precision; /* Precision */
char *rootdelay; /* RootDelay */
char *rootdispersion;/* RootDispersion */
char *refid; /* RefId */
u_char reftime[8]; /* RefTime */
u_char orgtime[8]; /* OrgTime */
u_char rcvtime[8]; /* ReceiveTime */
u_char xmttime[8]; /* TransmitTime */
u_int32_t reach; /* Reach */
int32_t timer; /* Timer */
char *offset; /* Offset */
char *delay; /* Delay */
char *dispersion; /* Dispersion */
int32_t filt_entries;
};
TAILQ_HEAD(peer_list, peer);
/* list of peers */
static struct peer_list peers = TAILQ_HEAD_INITIALIZER(peers);
struct filt {
/* required fields */
struct asn_oid index;
TAILQ_ENTRY(filt) link;
char *offset;
char *delay;
char *dispersion;
};
TAILQ_HEAD(filt_list, filt);
/* list of filters */
static struct filt_list filts = TAILQ_HEAD_INITIALIZER(filts);
/* configuration */
static u_char *ntp_host;
static u_char *ntp_port;
static uint32_t ntp_timeout;
static void ntpd_input(int, void *);
static int open_socket(void);
/* the initialization function */
static int
ntp_init(struct lmodule *mod, int argc, char *argv[] __unused)
{
module = mod;
if (argc != 0) {
syslog(LOG_ERR, "bad number of arguments for %s", __func__);
return (EINVAL);
}
ntp_host = strdup("localhost");
ntp_port = strdup("ntp");
ntp_timeout = 50; /* 0.5sec */
return (0);
}
/*
* Module is started
*/
static void
ntp_start(void)
{
if (open_socket() != -1) {
ntpd_fd = fd_select(ntpd_sock, ntpd_input, NULL, module);
if (ntpd_fd == NULL) {
syslog(LOG_ERR, "fd_select failed on ntpd socket: %m");
return;
}
}
reg_index = or_register(&oid_ntpMIB, "The MIB for NTP.", module);
}
/*
* Called, when the module is to be unloaded after it was successfully loaded
*/
static int
ntp_fini(void)
{
or_unregister(reg_index);
fd_deselect(ntpd_fd);
return (0);
}
const struct snmp_module config = {
.comment = "This module implements the NTP MIB",
.init = ntp_init,
.start = ntp_start,
.fini = ntp_fini,
.tree = ntp_ctree,
.tree_size = ntp_CTREE_SIZE,
};
/*
* Open the NTPD socket
*/
static int
open_socket(void)
{
struct addrinfo hints, *res, *res0;
int error;
const char *cause;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
error = getaddrinfo(ntp_host, ntp_port, &hints, &res0);
if (error) {
syslog(LOG_ERR, "%s(%s): %s", ntp_host, ntp_port,
gai_strerror(error));
return (-1);
}
ntpd_sock = -1;
cause = "no address";
errno = EADDRNOTAVAIL;
for (res = res0; res != NULL; res = res->ai_next) {
ntpd_sock = socket(res->ai_family, res->ai_socktype,
res->ai_protocol);
if (ntpd_sock == -1) {
cause = "socket";
continue;
}
if (connect(ntpd_sock, res->ai_addr, res->ai_addrlen) == -1) {
cause = "connect";
(void)close(ntpd_sock);
ntpd_sock = -1;
continue;
}
break;
}
if (ntpd_sock == -1) {
syslog(LOG_ERR, "%s: %m", cause);
return (-1);
}
freeaddrinfo(res0);
return (0);
}
/*
* Dump a packet
*/
static void
dump_packet(const u_char *pkt, size_t ret)
{
char buf[8 * 3 + 1];
size_t i, j;
for (i = 0; i < ret; i += 8) {
buf[0] = '\0';
for (j = 0; i + j < (size_t)ret && j < 8; j++)
sprintf(buf + strlen(buf), " %02x", pkt[i + j]);
syslog(LOG_INFO, "%04zu:%s", i, buf);
}
}
/*
* Execute an NTP request.
*/
static int
ntpd_request(u_int op, u_int associd, const char *vars)
{
u_char *rpkt;
u_char *ptr;
size_t vlen;
ssize_t ret;
if ((rpkt = malloc(NTPC_MAX)) == NULL) {
syslog(LOG_ERR, "%m");
return (-1);
}
memset(rpkt, 0, NTPC_MAX);
ptr = rpkt;
*ptr++ = (NTPC_VERSION << 3) | NTPC_MODE;
*ptr++ = op;
if (++seqno == 0)
seqno++;
*ptr++ = seqno >> 8;
*ptr++ = seqno;
/* skip status */
ptr += 2;
*ptr++ = associd >> 8;
*ptr++ = associd;
/* skip offset */
ptr += 2;
if (vars != NULL) {
vlen = strlen(vars);
if (vlen > NTPC_DMAX) {
syslog(LOG_ERR, "NTP request too long (%zu)", vlen);
free(rpkt);
return (-1);
}
*ptr++ = vlen >> 8;
*ptr++ = vlen;
memcpy(ptr, vars, vlen);
ptr += vlen;
} else
/* skip data length (is already zero) */
ptr += 2;
while ((ptr - rpkt) % 4 != 0)
*ptr++ = 0;
if (ntp_debug & DBG_DUMP_PKTS) {
syslog(LOG_INFO, "sending %zd bytes", ptr - rpkt);
dump_packet(rpkt, ptr - rpkt);
}
ret = send(ntpd_sock, rpkt, ptr - rpkt, 0);
if (ret == -1) {
syslog(LOG_ERR, "cannot send to ntpd: %m");
free(rpkt);
return (-1);
}
return (0);
}
/*
* Callback if packet arrived from NTPD
*/
static int
ntpd_read(uint16_t *op, uint16_t *associd, u_char **data, size_t *datalen)
{
u_char pkt[NTPC_MAX + 1];
u_char *ptr, *nptr;
u_int n;
ssize_t ret;
size_t z;
u_int offset; /* current offset */
int more; /* more flag */
int sel;
struct timeval inc, end, rem;
fd_set iset;
*datalen = 0;
*data = NULL;
offset = 0;
inc.tv_sec = ntp_timeout / 100;
inc.tv_usec = (ntp_timeout % 100) * 1000;
(void)gettimeofday(&end, NULL);
timeradd(&end, &inc, &end);
next:
/* compute remaining time */
(void)gettimeofday(&rem, NULL);
if (timercmp(&rem, &end, >=)) {
/* do a poll */
rem.tv_sec = 0;
rem.tv_usec = 0;
} else {
timersub(&end, &rem, &rem);
}
/* select */
FD_ZERO(&iset);
FD_SET(ntpd_sock, &iset);
sel = select(ntpd_sock + 1, &iset, NULL, NULL, &rem);
if (sel == -1) {
if (errno == EINTR)
goto next;
syslog(LOG_ERR, "select ntpd_sock: %m");
free(*data);
return (-1);
}
if (sel == 0) {
syslog(LOG_ERR, "timeout on NTP connection");
free(*data);
return (-1);
}
/* now read it */
ret = recv(ntpd_sock, pkt, sizeof(pkt), 0);
if (ret == -1) {
syslog(LOG_ERR, "error reading from ntpd: %m");
free(*data);
return (-1);
}
if (ntp_debug & DBG_DUMP_PKTS) {
syslog(LOG_INFO, "got %zd bytes", ret);
dump_packet(pkt, (size_t)ret);
}
ptr = pkt;
if ((*ptr & 0x3f) != ((NTPC_VERSION << 3) | NTPC_MODE)) {
syslog(LOG_ERR, "unexpected packet version 0x%x", *ptr);
free(*data);
return (-1);
}
ptr++;
if (!(*ptr & NTPC_BIT_RESP)) {
syslog(LOG_ERR, "not a response packet");
return (-1);
}
if (*ptr & NTPC_BIT_ERROR) {
z = *datalen - 12;
if (z > NTPC_DMAX)
z = NTPC_DMAX;
syslog(LOG_ERR, "error response: %.*s", (int)z, pkt + 12);
free(*data);
return (-1);
}
more = (*ptr & NTPC_BIT_MORE);
*op = *ptr++ & NTPC_OPMASK;
/* seqno */
n = *ptr++ << 8;
n |= *ptr++;
if (n != seqno) {
syslog(LOG_ERR, "expecting seqno %u, got %u", seqno, n);
free(*data);
return (-1);
}
/* status */
n = *ptr++ << 8;
n |= *ptr++;
/* associd */
*associd = *ptr++ << 8;
*associd |= *ptr++;
/* offset */
n = *ptr++ << 8;
n |= *ptr++;
if (n != offset) {
syslog(LOG_ERR, "offset: expecting %u, got %u", offset, n);
free(*data);
return (-1);
}
/* count */
n = *ptr++ << 8;
n |= *ptr++;
if ((size_t)ret < 12 + n) {
syslog(LOG_ERR, "packet too short");
return (-1);
}
nptr = realloc(*data, *datalen + n);
if (nptr == NULL) {
syslog(LOG_ERR, "cannot allocate memory: %m");
free(*data);
return (-1);
}
*data = nptr;
memcpy(*data + offset, ptr, n);
*datalen += n;
if (!more)
return (0);
offset += n;
goto next;
}
/*
* Send a request and wait for the response
*/
static int
ntpd_dialog(u_int op, u_int associd, const char *vars, u_char **data,
size_t *datalen)
{
uint16_t rassocid;
uint16_t rop;
if (ntpd_request(op, associd, vars) == -1)
return (-1);
if (ntpd_read(&rop, &rassocid, data, datalen) == -1)
return (-1);
if (rop != op) {
syslog(LOG_ERR, "bad response op 0x%x", rop);
free(data);
return (-1);
}
if (associd != rassocid) {
syslog(LOG_ERR, "response for wrong associd");
free(data);
return (-1);
}
return (0);
}
/*
* Callback if packet arrived from NTPD
*/
static void
ntpd_input(int fd __unused, void *arg __unused)
{
uint16_t associd;
uint16_t op;
u_char *data;
size_t datalen;
if (ntpd_read(&op, &associd, &data, &datalen) == -1)
return;
free(data);
}
/*
* Find the value of a variable
*/
static int
ntpd_parse(u_char **data, size_t *datalen, char **namep, char **valp)
{
u_char *ptr = *data;
u_char *end = ptr + *datalen;
char *ptr1;
char endc;
/* skip leading spaces */
while (ptr < end && isspace((int)*ptr))
ptr++;
if (ptr == end)
return (0);
*namep = ptr;
/* skip to space or '=' or ','*/
while (ptr < end && !isspace((int)*ptr) && *ptr != '=' && *ptr != ',')
ptr++;
endc = *ptr;
*ptr++ = '\0';
/* skip space */
while (ptr < end && isspace((int)*ptr))
ptr++;
if (ptr == end || endc == ',') {
/* no value */
*valp = NULL;
*datalen -= ptr - *data;
*data = ptr;
return (1);
}
if (*ptr == '"') {
/* quoted */
ptr++;
*valp = ptr;
while (ptr < end && *ptr != '"')
ptr++;
if (ptr == end)
return (0);
*ptr++ = '\0';
/* find comma */
while (ptr < end && isspace((int)*ptr) && *ptr == ',')
ptr++;
} else {
*valp = ptr;
/* skip to end of value */
while (ptr < end && *ptr != ',')
ptr++;
/* remove trailing blanks */
for (ptr1 = ptr; ptr1 > *valp; ptr1--)
if (!isspace((int)ptr1[-1]))
break;
*ptr1 = '\0';
if (ptr < end)
ptr++;
}
*datalen -= ptr - *data;
*data = ptr;
return (1);
}
/*
* Parse an int32 value
*/
static int
val_parse_int32(const char *val, int32_t *p, int32_t min, int32_t max, int base)
{
long n;
char *end;
errno = 0;
n = strtol(val, &end, base);
if (errno != 0 || *end != '\0')
return (0);
if (n < min || n > max)
return (0);
*p = (int32_t)n;
return (1);
}
/*
* Parse an uint32 value
*/
static int
val_parse_uint32(const char *val, uint32_t *p, uint32_t min, uint32_t max,
int base)
{
u_long n;
char *end;
errno = 0;
n = strtoul(val, &end, base);
if (errno != 0 || *end != '\0')
return (0);
if (n < min || n > max)
return (0);
*p = (uint32_t)n;
return (1);
}
/*
* Parse a double
*/
static int
val_parse_double(const char *val, double *p)
{
char *end;
errno = 0;
*p = strtod(val, &end);
if (errno != 0 || *end != '\0')
return (0);
return (1);
}
static int
val_parse_ts(const char *val, char *buf)
{
int r, n;
u_int i, f;
if (strlen(val) > 2 && val[0] == '0' && val[1] == 'x') {
/* hex format */
r = sscanf(val + 2, "%x.%x%n", &i, &f, &n);
if (r != 2 || (size_t)n != strlen(val + 2))
return (0);
} else {
/* probably decimal */
r = sscanf(val, "%d.%d%n", &i, &f, &n);
if (r != 2 || (size_t)n != strlen(val))
return (0);
}
buf[0] = i >> 24;
buf[1] = i >> 16;
buf[2] = i >> 8;
buf[3] = i >> 0;
buf[4] = f >> 24;
buf[5] = f >> 16;
buf[6] = f >> 8;
buf[7] = f >> 0;
return (1);
}
/*
* Parse an IP address. This resolves non-numeric names.
*/
static int
val_parse_ip(const char *val, u_char ip[4])
{
int r, n, error;
struct addrinfo hints, *res0;
struct sockaddr_in *sin_local;
r = sscanf(val, "%hhd.%hhd.%hhd.%hhd%n",
&ip[0], &ip[1], &ip[2], &ip[3], &n);
if (n == 4 && (size_t)n == strlen(val))
return (0);
memset(ip, 0, 4);
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
error = getaddrinfo(val, NULL, &hints, &res0);
if (error) {
syslog(LOG_ERR, "%s: %s", val, gai_strerror(error));
return (-1);
}
if (res0 == NULL) {
syslog(LOG_ERR, "%s: no address", val);
return (-1);
}
sin_local = (struct sockaddr_in *)(void *)res0->ai_addr;
ip[3] = sin_local->sin_addr.s_addr >> 24;
ip[2] = sin_local->sin_addr.s_addr >> 16;
ip[1] = sin_local->sin_addr.s_addr >> 8;
ip[0] = sin_local->sin_addr.s_addr >> 0;
freeaddrinfo(res0);
return (0);
}
/*
* Fetch system info
*/
static int
fetch_sysinfo(void)
{
u_char *data;
u_char *ptr;
size_t datalen;
char *name;
char *val;
if (ntpd_dialog(NTPC_OP_READVAR, 0,
"leap,stratum,precision,rootdelay,rootdispersion,refid,reftime,"
"poll,peer,clock,system,processor,jitter,stability",
&data, &datalen))
return (-1);
/* clear info */
sysb_leap = 0;
sysb_stratum = 0;
sysb_precision = 0;
free(sys_rootdelay);
sys_rootdelay = NULL;
free(sys_rootdispersion);
sys_rootdispersion = NULL;
free(sys_refid);
sys_refid = NULL;
sysb_reftime = 0;
sysb_poll = 0;
sysb_peer = 0;
sysb_clock = 0;
free(sys_system);
sys_system = NULL;
free(sys_processor);
sys_processor = NULL;
sysb_jitter = 0;
sysb_stability = 0;
ptr = data;
while (ntpd_parse(&ptr, &datalen, &name, &val)) {
if (ntp_debug & DBG_DUMP_VARS)
syslog(LOG_DEBUG, "%s: '%s'='%s'", __func__, name, val);
if (strcmp(name, "leap") == 0 ||
strcmp(name, "sys.leap") == 0) {
sysb_leap = val_parse_int32(val, &sys_leap,
0, 3, 2);
} else if (strcmp(name, "stratum") == 0 ||
strcmp(name, "sys.stratum") == 0) {
sysb_stratum = val_parse_int32(val, &sys_stratum,
0, 255, 0);
} else if (strcmp(name, "precision") == 0 ||
strcmp(name, "sys.precision") == 0) {
sysb_precision = val_parse_int32(val, &sys_precision,
INT32_MIN, INT32_MAX, 0);
} else if (strcmp(name, "rootdelay") == 0 ||
strcmp(name, "sys.rootdelay") == 0) {
sys_rootdelay = strdup(val);
} else if (strcmp(name, "rootdispersion") == 0 ||
strcmp(name, "sys.rootdispersion") == 0) {
sys_rootdispersion = strdup(val);
} else if (strcmp(name, "refid") == 0 ||
strcmp(name, "sys.refid") == 0) {
sys_refid = strdup(val);
} else if (strcmp(name, "reftime") == 0 ||
strcmp(name, "sys.reftime") == 0) {
sysb_reftime = val_parse_ts(val, sys_reftime);
} else if (strcmp(name, "poll") == 0 ||
strcmp(name, "sys.poll") == 0) {
sysb_poll = val_parse_int32(val, &sys_poll,
INT32_MIN, INT32_MAX, 0);
} else if (strcmp(name, "peer") == 0 ||
strcmp(name, "sys.peer") == 0) {
sysb_peer = val_parse_uint32(val, &sys_peer,
0, UINT32_MAX, 0);
} else if (strcmp(name, "clock") == 0 ||
strcmp(name, "sys.clock") == 0) {
sysb_clock = val_parse_ts(val, sys_clock);
} else if (strcmp(name, "system") == 0 ||
strcmp(name, "sys.system") == 0) {
sys_system = strdup(val);
} else if (strcmp(name, "processor") == 0 ||
strcmp(name, "sys.processor") == 0) {
sys_processor = strdup(val);
} else if (strcmp(name, "jitter") == 0 ||
strcmp(name, "sys.jitter") == 0) {
sysb_jitter = val_parse_double(val, &sys_jitter);
} else if (strcmp(name, "stability") == 0 ||
strcmp(name, "sys.stability") == 0) {
sysb_stability = val_parse_double(val, &sys_stability);
}
}
free(data);
return (0);
}
static int
parse_filt(char *val, uint16_t associd, int which)
{
char *w;
int cnt;
struct filt *f;
cnt = 0;
for (w = strtok(val, " \t"); w != NULL; w = strtok(NULL, " \t")) {
TAILQ_FOREACH(f, &filts, link)
if (f->index.subs[0] == associd &&
f->index.subs[1] == (asn_subid_t)(cnt + 1))
break;
if (f == NULL) {
f = malloc(sizeof(*f));
memset(f, 0, sizeof(*f));
f->index.len = 2;
f->index.subs[0] = associd;
f->index.subs[1] = cnt + 1;
INSERT_OBJECT_OID(f, &filts);
}
switch (which) {
case 0:
f->offset = strdup(w);
break;
case 1:
f->delay = strdup(w);
break;
case 2:
f->dispersion = strdup(w);
break;
default:
abort();
}
cnt++;
}
return (cnt);
}
/*
* Fetch the complete peer list
*/
static int
fetch_peers(void)
{
u_char *data, *pdata, *ptr;
size_t datalen, pdatalen;
int i;
struct peer *p;
struct filt *f;
uint16_t associd;
char *name, *val;
/* free the old list */
while ((p = TAILQ_FIRST(&peers)) != NULL) {
TAILQ_REMOVE(&peers, p, link);
free(p->rootdelay);
free(p->rootdispersion);
free(p->refid);
free(p->offset);
free(p->delay);
free(p->dispersion);
free(p);
}
while ((f = TAILQ_FIRST(&filts)) != NULL) {
TAILQ_REMOVE(&filts, f, link);
free(f->offset);
free(f->delay);
free(f->dispersion);
free(f);
}
/* fetch the list of associations */
if (ntpd_dialog(NTPC_OP_READSTAT, 0, NULL, &data, &datalen))
return (-1);
for (i = 0; i < (int)(datalen / 4); i++) {
associd = data[4 * i + 0] << 8;
associd |= data[4 * i + 1] << 0;
/* ask for the association variables */
if (ntpd_dialog(NTPC_OP_READVAR, associd,
"config,srcadr,srcport,dstadr,dstport,leap,hmode,stratum,"
"hpoll,ppoll,precision,rootdelay,rootdispersion,refid,"
"reftime,org,rec,xmt,reach,timer,offset,delay,dispersion,"
"filtdelay,filtoffset,filtdisp",
&pdata, &pdatalen)) {
free(data);
return (-1);
}
/* now save and parse the data */
p = malloc(sizeof(*p));
if (p == NULL) {
free(data);
syslog(LOG_ERR, "%m");
return (-1);
}
memset(p, 0, sizeof(*p));
p->index = associd;
INSERT_OBJECT_INT(p, &peers);
ptr = pdata;
while (ntpd_parse(&ptr, &pdatalen, &name, &val)) {
if (ntp_debug & DBG_DUMP_VARS)
syslog(LOG_DEBUG, "%s: '%s'='%s'",
__func__, name, val);
if (strcmp(name, "config") == 0 ||
strcmp(name, "peer.config") == 0) {
val_parse_int32(val, &p->config, 0, 1, 0);
} else if (strcmp(name, "srcadr") == 0 ||
strcmp(name, "peer.srcadr") == 0) {
val_parse_ip(val, p->srcadr);
} else if (strcmp(name, "srcport") == 0 ||
strcmp(name, "peer.srcport") == 0) {
val_parse_uint32(val, &p->srcport,
1, 65535, 0);
} else if (strcmp(name, "dstadr") == 0 ||
strcmp(name, "peer.dstadr") == 0) {
val_parse_ip(val, p->dstadr);